Does Sydney Water Actually Contain Fluoride?
Yes. Sydney Water has been fluoridating the water supply since 1968 under the NSW Fluoridation of Public Water Supplies Act. The current target level is 1.0 mg/L (one milligram per litre), with an acceptable range of 0.6–1.0 mg/L. This is substantially below the Australian Drinking Water Guidelines maximum of 1.5 mg/L.
The fluoride is added in the form of hydrofluorosilicic acid (HFSA) at water treatment plants before distribution to homes across Greater Sydney. It's the same level you'd find in most major Australian cities, Melbourne, Brisbane, and Adelaide all fluoridate at similar levels.
Why Can't a Carbon Filter Remove Fluoride?
Carbon filtration works by adsorption, contaminant molecules physically bind to the surface of activated carbon granules as water passes through. This works extremely well for chlorine, chloramines, organic compounds, and many heavy metals because these molecules bind readily to carbon surfaces.
Fluoride ions (F⁻) are small, highly electronegative, and don't adsorb effectively onto activated carbon. The carbon surface simply cannot hold them. This is a fundamental chemistry limitation, no amount of carbon filter quality or contact time will make a carbon filter remove meaningful quantities of fluoride.
Reverse osmosis works differently. An RO membrane is a physical barrier with microscopic pores small enough to reject fluoride ions by size and charge exclusion. Water molecules are small enough to pass through; fluoride ions are not. This is why RO consistently achieves 95–99% fluoride removal.
Is Fluoride in Drinking Water Harmful?
This is a genuinely contested area. The official position of Australian health authorities, the World Health Organisation, and the National Health and Medical Research Council is that fluoridation at current levels is safe and beneficial for dental health, particularly for children.
However, a growing body of independent research raises questions about potential effects at levels above 1.5 mg/L, effects on the thyroid, and cumulative exposure when accounting for dietary fluoride sources. Many health-conscious families choose to apply the precautionary principle and remove fluoride from their drinking water regardless of the official position.
The key point is that this is your choice. An under-sink RO system only filters your kitchen drinking water, your other taps, including the bathroom tap you brush your teeth with, remain unchanged. So you retain the dental benefit while choosing not to consume fluoride through drinking and cooking.
Which RO System Should I Choose?
All four systems Jean-Paul installs will remove fluoride effectively, the difference is in additional features and stages:
- Pure Plus+ ($840), Best value entry point. Full RO fluoride removal, 5 stages, proven technology. The most popular system Jean-Paul installs.
- Pure Compact ($930.88), Same core RO technology in a more compact form factor. Ideal for smaller kitchens or apartments.
- Pure Premium ($1,180), 7 stages including enhanced pre-filtration and UV sterilisation. Best for those who also want to address PFAS, bacteria and the broadest range of contaminants.
- Pure Advanced ($1,281.88), 5-stage quick-change system with advanced alkaline remineralisation. Best for families who want both fluoride removal AND the benefits of alkaline, mineral-rich water.
If you're unsure, call Jean-Paul on 0430 546 749. He'll ask about your kitchen configuration, water usage and specific concerns, and give you an honest recommendation without trying to upsell you.
